In 1912, geophysicist Alfred Wegener proposed the theory of continental drift, suggesting that Earth's continents were once joined in a single supercontinent. For decades, Wegener's hypothesis was widely dismissed by the scientific community due to the lack of a known physical mechanism that could move landmasses. ______ in the 1950s and 1960s, the discovery of seafloor spreading provided the geological evidence required to validate his ideas, paving the way for the acceptance of plate tectonics.
Which choice completes the passage with the most logical transition?
- APreviously,
- Subsequently,Cevap
- CConversely,
- DFor instance,
Cevap
Subsequently,
The transition 'Subsequently' is correct because it logically connects the chronological events in the passage. The passage first describes Alfred Wegener's 1912 proposal and the decades of skepticism that followed, and then transitions to a later event in the 1950s and 1960s (the discovery of seafloor spreading) that validated his ideas. 'Subsequently' correctly signals that this validation occurred after the initial proposal and dismissal.
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Anahtar Kavram
Chronological transitions establish the order in which events occur. When moving forward in time from an earlier event to a later one, transitions like 'subsequently', 'afterward', or 'later' should be used.